Connecting link between the rotor and the CAM plate of a variable displacement swash plate compressor

Abstract

A connecting link between a rotor supported by a driving shaft to rotate synchronously with the driving shaft and a variable inclination cam plate supported by the driving shaft of a variable displacement swash plate compressor comprises a first arm extending from the rotor toward the cam plate and a second arm extending from the cam plate toward the rotor. The first arm is provided with an oval guide hole extending at right angles to a plane defined by the central axis of the driving shaft and the top dead center of the cam plate. The second arm is provided with a pin extending at right angles to the plane. The pin has a sector-shaped cross section with rounded apex. The pin is inserted in the oval guide hole with the apex of the sector-shaped cross section abutted against the long side surface of the oval guide hole distant from the rotor and the circular arc portion of the sector-shaped cross section abutted against the long side surface of the oval guide hole close to the rotor.

What is claimed is:  
     
       1. A connecting link between a rotor supported by a driving shaft to rotate synchronously with the driving shaft and a variable inclination cam plate supported by the driving shaft of a variable displacement swash plate compressor, comprising a first arm extending from the rotor toward the cam plate and a second arm extending from the cam plate toward the rotor, wherein the first arm is provided with an oval guide hole extending at right angles to a plane defined by the central axis of the driving shaft and the top dead center of the cam plate, the second arm is provided with a pin extending at right angles to the plane, and the has a sector-shaped cross section with a rounded apex, and the pin is inserted in the oval guide hole with the apex of the sector-shaped cross section abutted against the long side surface of the oval guide hole distant from the rotor and a circular arc portion of the sector-shaped cross section abutted against the long side surface of the oval guide hole close to the rotor. 
     
     
       2. A connecting link of  claim 1 , wherein engagement between the oval guide hole and the pin is established at each side of the plane. 
     
     
       3. A connecting link of  claim 2 , wherein a pair of second arms extend from the cam plate toward the rotor and are provided with a single pin extending from one of the second arms to the other of the second arms. 
     
     
       4. A connecting link of  claim 2 , wherein a pair of second arms extend from the cam plate toward the rotor and each of them is provided with a single pin. 
     
     
       5. A connecting link between a rotor supported by a driving shaft to rotate synchronously with the driving shaft and a variable inclination cam plate supported by the driving shaft of a variable displacement swash plate compressor, comprising a first arm extending from the rotor toward the cam plate and a second arm extending from the cam plate toward the rotor, wherein the first arm is provided with a guide groove extending parallel to a plane defined by the central axis of the driving shaft and the top dead center of the cam plate, the second arm is provided with a tip whose shape as viewed from the side is a sector with rounded apex, and the tip of the second arm is inserted in the guide groove with the apex of the sector abutted against the side surface of the guide groove distant from the rotor and the circular arc portion of the sector abutted against the side surface of the guide groove close to the rotor. 
     
     
       6. A connecting link of  claim 5 , wherein engagement between the guide groove and the tip of the second arm is established at each side of the plane. 
     
     
       7. A connecting link between a rotor supported by a driving shaft to rotate synchronously with the driving shaft and a variable inclination cam plate supported by the driving shaft of a variable displacement swash plate compressor, comprising a first arm extending from the rotor toward the cam plate and a second arm extending from the cam plate toward the rotor, wherein the first arm is provided with a guide hole extending parallel to a plane defined by the central axis of the driving shaft and the top dead center of the cam plate, the second arm is provided with a tip whose shape as viewed from the side is a sector with rounded apex, and the tip of the second arm is inserted in the guide hole with the apex of the sector abutted against the side surface of the guide hole distant from the rotor and a circular arc portion of the sector abutted against the side surface of the guide hole close to the rotor. 
     
     
       8. A connecting link of  claim 7 , wherein engagement between the guide hole and the tip of the second arm is established at each side of the plane.